Sash lifter and latch



B. F. BURT SASH LIFTER AND LATCH 2 Sheets-Sheet 1 U [[1 K LrLrLrL '2 '2 1 l 6 Q 1 p. NH ,W Q 4y [{Iwi u it V T 1 5 w 6 W5) Mr 4 5 m Filed June 9, 1927 5 2 P, I I a 5 is Q /L I} W. a w n Q m 6 l I r W1; WP. w

Oct. 23, 1928.

B. F. BURT SASH LIFTER AND LATCH Filed June 9, 1927 2 Sheets-Sheet NJHMIN Fgrr, MZMW'H MA;

Guam

\\ VIIIIIV Patented Oct. 23, 1928.

UNITED STATES PATENT OFFICE.

BENJAMIN F. BURT, OF DAYTON, OHIO, ASSIGNOR TO THEDAYTON MANUFACTURING COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

SASH LIFTER AND LATCH.

Application filed; June 9,

It is well known that at times a sliding window sash will become stuck in its casing or frame so that windows can be opened only with considerable difiiculty. It is therefore desirable to provide such sliding sashes with some device which will facilitate the opening of the window. Various types of devices for this purpose have been proposed, but they are open to the objections that they are more or less clumsy in operation, are rather liable to get out of order, and do not always function in. the desired manner.

The object of the present invention is to provide a device of this character, which is compact in form, cannot readily get out of order and will exert a strong lifting moment upon the normal operation of thev device in opening a window.

A further object of the device is to produce upon the lifting mechanism a relatively strong push upon the exertion of the normal amount of power applied to such devices in their usual operation, this power being applied to the handle of the device, this handle serving as a portion of a lever. It will be seenfroman examination of the drawings forming a part of this disclosure that the device produced constitutes a compact and positively-acting means to accomplish the desired purpose.

Referring to the drawings:

Fig. 1 shows in perspective the device in its normal. operative position, the window being closed.

Fig. 2 is a perspective of the device showing the same during its operation, illustrating the device in the act of lifting the window.

Fig. 3 is a rear elevation of the device in the position shown in Fig. 1.

Fig. 4: is a similar view of the device in the position shown in Fig. 2.

Fig. 5 is also a sectional view showing the arrangement of the latching device and the window lifting device,the operating handle being in. the position shown in Fig. 1.

Fig. 6 is a view similar to Fig. 5 but showing the arrangement of the parts when the operating handle is depressed as in Fig. 2.

Fig. 7 is a sectional, VlGW' taken along the line 77 of Fig. 3.

Fig. 8 is a sectional view taken along the line 8-8 of Fig. 3.

1927. Serial No. 197,550.

Fig. 9 is a perspective view of the latching mechanism.

Fig. 10 1s a. perspective view of the operating handle illustrating the means by which the handle is pivoted and also the means.

with which it is brought into operative engagement with the other portions of the mechanism.

Fig. 11 is a perspective view of the sash lifting device.

From the drawings it will be seen that the device is attached to the sash of the window, the said sash being generally represented as at 1, the frame being provided with notches 1', the said notches being formed in a stop bar fastened to the frame. 'These notches serve as points into which the latching device of the window fits, so that the height to which the sash is raised may be readily adjusted.

The device itself consists of the housing 2 secured to the sash by screws 3v and 6, or by any appropriate means equivalent there to. The housing is adapted toreceive a handle 4, this handle serving as a lever, the fulcrum of which is shown at 10, the lever being so formed that the arm designated at 4 is shorter than the handle of the lever. This arm is formed as an eccentric as shown clearly in Fig. 10.

The housing 2 is formed with a second fixed handle 5 conveniently formed integral with the housing 2.

The housing 2 is also provided with a latching member 7 which is adapted to fit into the depressions 1, enabling the window sash tov be raised to any desired height, this latching member ,7 being fitted with a lug 8, in which is inserted the projection 9 of the lever arm 4: This latching member 7 is provided with a shank 15 which enters into a recess 19 in the housing, as shown in Figs. 5 and 6, for example. This shank 15 is itself recessed as shown at 18, a spring 14;

being inserted therein, the spring 14 being also inserted in the recess 15'. The action of this spring is normally to hold the latch 7 in extended position to engage the notches 1, but it willv be seen that the latch 7 isv retractable into the housing when operated against the pressure of the spring 14:.

The arm of the lever carries the member 12 which projects through the lower part of the housing, the member 12 being pivoted to the lever at 11, being retained in place by the guard 16, usually formed integral with the lever. The member 12 usually abuts the plate 13 inserted in the Window frame, this plate 13 being preferably of metal, or of an equivalent hard substance, the plate 18 serving as a bearing member for the member 12. The lever 1 is fulcrumed at 10, a screw or equivalent fastening means 17 securing the said lever into proper position.

In its normal position the device will be as shown in Figure 1, the handle 4; of the lever being held in raised position because of the forward thrust of the spring it on the latch 7. Because of the fact that the lever handle 4 is in a raised position, the lifting member 12 is also in a raised position, and the window sash is shut against the bottom of the frame.

When it is desired to raise the sash the handle 4 is pushed down, as shown in Figure 2, and because of the eccentric form of the lever arm 4, the projection 9 of the lever fitting into the lug 80f the latch and serving as a pivot upon which the latch 7 is drawn back. Simultaneously with the operation of the latch 7, the member 12 is pushed downwardly against the plate 13, this action being due also to the eccentric form of the lever arm 4' and the shape of the guard 16. It will be seen that the handle of lever 4 constitutes a lever of the second order, the force being exerted between the point of application of power and the point at which the lever is fulcrumed. It will also be seen that because of this arrangement a considerable 7 force will be applied to the member 12 and also to retract the latch 7 upon the application of such amount of power applied on the handle 1 as is normally employed for such purpose.

It will thus be seen that pressing down 1 upon the handle 4 will transmit a vertical thrust upon the member 12 and will also exert a horizontal pull upon the latch 7 the latch 7 being retracted and the member 12 pushed'downwardly simultaneously with the operation of the handle 4:. The result of this is to release the latch from the depressions with Which it registers and also to impart an initial upward thrust to the window sash, thus starting the raising of the said mounted upon the sash, a lever extending into the housing, the said lever being fulcrumed adjacent one extremity thereof, the arm of the lever being eccentrically formed, a retractable latching member associated with the lever and in operative relationship therewith, a second'member pivoted to the said lever and normally abutting on the window frame, and a bearing carried by the lever arm for the end of the said second member and adjacent the pivot point thereof, whereby upon operation of the lever the said latching member will be retracted and the pivoted member simultaneously actuated against the window frame to force the said sash away from its seat.

2. The combination with a window frame and a sliding sash therein of a housing mounted upon the said frame, a lever having a handle portion and an arm within the housing shorter than the said handle portion, said arm being in the form of an eccentric and fulcrumed at a point adjacent the remote extremity of the said arm, a retractable latching member operated by the said lever and a second member pivoted to the said lever and normally abutting upon the window frame, and a bearing carried by the lever arm for the end of the said second member and adjacent the pivot point thereof, whereby upon depression of the lever handle the latching member will be retracted and the pivoted member forced against the casing to lift the sash from its seat.

3. The combination with a window frame and a sliding sash therein of a housing, a latching member retractable within the housing, a lug integral with the said latching member, a lever comprising a handle and an arm shorter than the handle, the said arm being in the form of an eccentric, a pin carried by the eccentric fitting into the lug of the latching member, and a second member pivoted to the lever and normally abutting the window frame, and an eccentric bearing integral with the lever arm for the end of the said second member and located adjacent the pivot point thereof, whereby upon operation of the lever, the latch is retracted and the said pivoted member is forced against the window frame to lift the sash from its seat.

4. A window lifting and locking device comprising a housing, a latching device retractable within the said housing, the said latching device being provided with a lug with a recessed shank, a spring within the arm, engaging the said lug of the latching member, and a second member pivoted to the said lever arm and normally adapted to abut against the window casing and to exert a pushing action against the said casing upon operation of the lever, the said spring as sociated With the latching member normally retaining the various parts of the device in operative osition.

5. A sas latching and lifting device comprising a housing, a latching device retractable Within the said housing, the said latching device being provided With a lug and a recessed shank, a spring Within the said recess and also Within a corresponding recess in the Wall of the housing, a lever projecting Within the housing and provided With an eccentric arm engaging the said lug of the latching member, a fulcrum for the lever carried by the inner surface of the side of the housing, a relatively small perforation in the lever adjacent the fulcrum, an eccentric flange partially surrounding the said perforation, a lifting member projecting into the housing and normally adapted to abut against a sash casing, a pin secured to the said member and loosely fitting in the small perforation in the lever, the said flange engaging the end of the lifting member and forming a bearing therefor, whereby upon operation of the lever the said pin engages the flange about the said perforation and causes the said member to exert a pushing action against the Window casing, the operation of the lever also causing a retraction of the latching member, the said spring associated With the latching member normally retaining the various parts of the device in operative position.

6. A sash latching and lifting device comprising the combination of the latching and lifting members, of an eccentric lever of the econd order adapted to simultaneously operate the latching and lifting means, the said lever being provided with a perforation to receive a pin projecting from the lifting member, an eccentric flange partially surrounding the said aperture serving as a bearing for the end of the lifting member, a pin on the eccentric lever adapted to engage the latching member to retract the same upon operation of the lever, and a pin upon the lifting member loosely fitting in the said perforation.

7. A sash latching and lifting device comprising the combination With a housing, of latching and lifting members projecting into the said housing, a recessed lug and a recessed shank integral With the latching member, a pin carried by the lifting member, and an eccentric lever of the second order pivoted Within the housing, a pin upon the eccentric of the lever adapted to engage the recess in the lug of the latching member, an eccentric flange carried by the lever engaging the end of the lifting member to form a bearing therefor, the said lever being provided With a perforation adjacent the fulcrum to receive the pin, the actuation of the lever simultaneously retracting the latching member and pressing upon the lifting member to lift the sash.

8. A sash latching and lifting device comprising a housing, a lifting member and a retractable latching member extending into the said housing, an eccentric lever of the second order fulcrumed in the said housing, a bearing for the lifting member carried by the said lever, means on the said lever for engaging the latching member, and a pin carried by the lifting member, the said lever being provided with a perforation into Which the said pin is adapted to loosely fit, Whereby upon actuation of the lever the end of the lift-ing member is brought through lost mo tion into contact With the bearing member, further actuation of the lever causing the simultaneous operation of the latching and lifting members.

In testimony whereof, I afiix my signature.

BENJAMIN F. BURT. 

